"All Along the Watchtower" is a song by American singer-songwriter Bob Dylan from his eighth studio album, John Wesley Harding (1967). The song was written by Dylan and produced by Bob Johnston. The song's lyrics, which in its original version contain twelve lines, feature a conversation between a joker and a thief. The song has been subject to various interpretations; some reviewers have noted that it echoes lines in the Book of Isaiah, Chapter 21, verses 5–9. Dylan has released several different live performances, and versions of the song are included on some of his subsequent greatest hits compilations.

Covered by numerous artists, "All Along the Watchtower" is strongly identified with the interpretation Jimi Hendrix recorded with the Jimi Hendrix Experience for their third studio album, Electric Ladyland (1968). The Hendrix version, released six months after Dylan's original recording, became a Top 20 single in 1968, received a Grammy Hall of Fame award in 2001, and was ranked 48th in Rolling Stone magazine's 500 Greatest Songs of All Time in 2004 (40th in the 2021 version). Dylan first played the song live in concert on the Bob Dylan and the Band 1974 Tour, his first tour since 1966. His live performances have been influenced by Hendrix's cover, to the extent that they have been called covers of a cover. The singer has performed the song live more than any of his other ones, with over 2,250 recitals.